OLD | NEW |
1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "core/page/scrolling/RootScrollerController.h" | 5 #include "core/page/scrolling/RootScrollerController.h" |
6 | 6 |
7 #include "core/dom/Document.h" | 7 #include "core/dom/Document.h" |
8 #include "core/dom/Element.h" | 8 #include "core/dom/Element.h" |
9 #include "core/frame/FrameHost.h" | 9 #include "core/frame/FrameHost.h" |
10 #include "core/frame/FrameView.h" | 10 #include "core/frame/FrameView.h" |
| 11 #include "core/frame/TopControls.h" |
| 12 #include "core/frame/VisualViewport.h" |
11 #include "core/layout/LayoutBox.h" | 13 #include "core/layout/LayoutBox.h" |
| 14 #include "core/page/ChromeClient.h" |
| 15 #include "core/page/Page.h" |
| 16 #include "core/page/scrolling/OverscrollController.h" |
| 17 #include "core/page/scrolling/ViewportScrollCallback.h" |
12 #include "core/paint/PaintLayerScrollableArea.h" | 18 #include "core/paint/PaintLayerScrollableArea.h" |
13 #include "platform/graphics/GraphicsLayer.h" | 19 #include "platform/graphics/GraphicsLayer.h" |
14 #include "platform/scroll/ScrollableArea.h" | 20 #include "platform/scroll/ScrollableArea.h" |
15 | 21 |
16 namespace blink { | 22 namespace blink { |
17 | 23 |
18 class RootFrameViewport; | 24 class RootFrameViewport; |
19 | 25 |
20 namespace { | 26 namespace { |
21 | 27 |
22 bool fillsViewport(const Element& element) | 28 ScrollableArea* scrollableAreaFor(const Element& element) |
23 { | |
24 DCHECK(element.layoutObject()); | |
25 DCHECK(element.layoutObject()->isBox()); | |
26 | |
27 LayoutObject* layoutObject = element.layoutObject(); | |
28 | |
29 // TODO(bokan): Broken for OOPIF. | |
30 Document& topDocument = element.document().topDocument(); | |
31 | |
32 Vector<FloatQuad> quads; | |
33 layoutObject->absoluteQuads(quads); | |
34 DCHECK_EQ(quads.size(), 1u); | |
35 | |
36 if (!quads[0].isRectilinear()) | |
37 return false; | |
38 | |
39 LayoutRect boundingBox(quads[0].boundingBox()); | |
40 | |
41 return boundingBox.location() == LayoutPoint::zero() | |
42 && boundingBox.size() == topDocument.layoutViewItem().size(); | |
43 } | |
44 | |
45 } // namespace | |
46 | |
47 // static | |
48 RootScrollerController* RootScrollerController::create(Document& document) | |
49 { | |
50 return new RootScrollerController(document); | |
51 } | |
52 | |
53 RootScrollerController::RootScrollerController(Document& document) | |
54 : m_document(&document) | |
55 { | |
56 } | |
57 | |
58 DEFINE_TRACE(RootScrollerController) | |
59 { | |
60 visitor->trace(m_document); | |
61 visitor->trace(m_rootScroller); | |
62 visitor->trace(m_effectiveRootScroller); | |
63 } | |
64 | |
65 void RootScrollerController::set(Element* newRootScroller) | |
66 { | |
67 m_rootScroller = newRootScroller; | |
68 updateEffectiveRootScroller(); | |
69 } | |
70 | |
71 Element* RootScrollerController::get() const | |
72 { | |
73 return m_rootScroller; | |
74 } | |
75 | |
76 Element* RootScrollerController::effectiveRootScroller() const | |
77 { | |
78 return m_effectiveRootScroller; | |
79 } | |
80 | |
81 void RootScrollerController::didUpdateLayout() | |
82 { | |
83 updateEffectiveRootScroller(); | |
84 } | |
85 | |
86 void RootScrollerController::updateEffectiveRootScroller() | |
87 { | |
88 bool rootScrollerValid = | |
89 m_rootScroller && isValidRootScroller(*m_rootScroller); | |
90 | |
91 Element* newEffectiveRootScroller = rootScrollerValid | |
92 ? m_rootScroller.get() | |
93 : defaultEffectiveRootScroller(); | |
94 | |
95 if (m_effectiveRootScroller == newEffectiveRootScroller) | |
96 return; | |
97 | |
98 m_effectiveRootScroller = newEffectiveRootScroller; | |
99 } | |
100 | |
101 ScrollableArea* RootScrollerController::scrollableAreaFor( | |
102 const Element& element) const | |
103 { | 29 { |
104 if (!element.layoutObject() || !element.layoutObject()->isBox()) | 30 if (!element.layoutObject() || !element.layoutObject()->isBox()) |
105 return nullptr; | 31 return nullptr; |
106 | 32 |
107 LayoutBox* box = toLayoutBox(element.layoutObject()); | 33 LayoutBox* box = toLayoutBox(element.layoutObject()); |
108 | 34 |
109 // For a FrameView, we use the layoutViewport rather than the | 35 // For a FrameView, we use the layoutViewport rather than the |
110 // getScrollableArea() since that could be the RootFrameViewport. The | 36 // getScrollableArea() since that could be the RootFrameViewport. The |
111 // rootScroller's ScrollableArea will be swapped in as the layout viewport | 37 // rootScroller's ScrollableArea will be swapped in as the layout viewport |
112 // in RootFrameViewport so we need to ensure we get the layout viewport. | 38 // in RootFrameViewport so we need to ensure we get the layout viewport. |
113 if (box->isDocumentElement()) | 39 if (box->isDocumentElement()) |
114 return element.document().view()->layoutViewportScrollableArea(); | 40 return element.document().view()->layoutViewportScrollableArea(); |
115 | 41 |
116 return static_cast<PaintInvalidationCapableScrollableArea*>( | 42 return static_cast<PaintInvalidationCapableScrollableArea*>( |
117 box->getScrollableArea()); | 43 box->getScrollableArea()); |
118 } | 44 } |
119 | 45 |
120 bool RootScrollerController::isValidRootScroller(const Element& element) const | 46 bool fillsViewport(const Element& element) |
| 47 { |
| 48 DCHECK(element.layoutObject()); |
| 49 DCHECK(element.layoutObject()->isBox()); |
| 50 |
| 51 LayoutObject* layoutObject = element.layoutObject(); |
| 52 |
| 53 // TODO(bokan): Broken for OOPIF. |
| 54 Document& topDocument = element.document().topDocument(); |
| 55 |
| 56 Vector<FloatQuad> quads; |
| 57 layoutObject->absoluteQuads(quads); |
| 58 DCHECK_EQ(quads.size(), 1u); |
| 59 |
| 60 if (!quads[0].isRectilinear()) |
| 61 return false; |
| 62 |
| 63 LayoutRect boundingBox(quads[0].boundingBox()); |
| 64 |
| 65 return boundingBox.location() == LayoutPoint::zero() |
| 66 && boundingBox.size() == topDocument.layoutViewItem().size(); |
| 67 } |
| 68 |
| 69 bool isValidRootScroller(const Element& element) |
121 { | 70 { |
122 if (!element.layoutObject()) | 71 if (!element.layoutObject()) |
123 return false; | 72 return false; |
124 | 73 |
125 if (!scrollableAreaFor(element)) | 74 if (!scrollableAreaFor(element)) |
126 return false; | 75 return false; |
127 | 76 |
128 if (!fillsViewport(element)) | 77 if (!fillsViewport(element)) |
129 return false; | 78 return false; |
130 | 79 |
131 return true; | 80 return true; |
132 } | 81 } |
133 | 82 |
| 83 } // namespace |
| 84 |
| 85 RootScrollerController::RootScrollerController(Document& document) |
| 86 : m_document(&document) |
| 87 { |
| 88 } |
| 89 |
| 90 DEFINE_TRACE(RootScrollerController) |
| 91 { |
| 92 visitor->trace(m_document); |
| 93 visitor->trace(m_viewportApplyScroll); |
| 94 visitor->trace(m_rootScroller); |
| 95 visitor->trace(m_effectiveRootScroller); |
| 96 visitor->trace(m_currentViewportApplyScrollHost); |
| 97 } |
| 98 |
| 99 void RootScrollerController::set(Element* newRootScroller) |
| 100 { |
| 101 m_rootScroller = newRootScroller; |
| 102 updateEffectiveRootScroller(); |
| 103 } |
| 104 |
| 105 Element* RootScrollerController::get() const |
| 106 { |
| 107 return m_rootScroller; |
| 108 } |
| 109 |
| 110 Element* RootScrollerController::effectiveRootScroller() const |
| 111 { |
| 112 return m_effectiveRootScroller; |
| 113 } |
| 114 |
| 115 void RootScrollerController::didUpdateLayout() |
| 116 { |
| 117 updateEffectiveRootScroller(); |
| 118 } |
| 119 |
| 120 void RootScrollerController::updateEffectiveRootScroller() |
| 121 { |
| 122 bool rootScrollerValid = |
| 123 m_rootScroller && isValidRootScroller(*m_rootScroller); |
| 124 |
| 125 Element* newEffectiveRootScroller = rootScrollerValid |
| 126 ? m_rootScroller.get() |
| 127 : defaultEffectiveRootScroller(); |
| 128 |
| 129 if (m_effectiveRootScroller == newEffectiveRootScroller) |
| 130 return; |
| 131 |
| 132 m_effectiveRootScroller = newEffectiveRootScroller; |
| 133 |
| 134 if (m_document->isInMainFrame()) |
| 135 setViewportApplyScrollOnRootScroller(); |
| 136 } |
| 137 |
| 138 void RootScrollerController::setViewportApplyScrollOnRootScroller() |
| 139 { |
| 140 DCHECK(m_document->isInMainFrame()); |
| 141 |
| 142 if (!m_viewportApplyScroll || !m_effectiveRootScroller) |
| 143 return; |
| 144 |
| 145 ScrollableArea* targetScroller = |
| 146 scrollableAreaFor(*m_effectiveRootScroller); |
| 147 |
| 148 if (!targetScroller) |
| 149 return; |
| 150 |
| 151 if (m_currentViewportApplyScrollHost) |
| 152 m_currentViewportApplyScrollHost->removeApplyScroll(); |
| 153 |
| 154 // Use disable-native-scroll since the ViewportScrollCallback needs to |
| 155 // apply scroll actions both before (TopControls) and after (overscroll) |
| 156 // scrolling the element so it will apply scroll to the element itself. |
| 157 m_effectiveRootScroller->setApplyScroll( |
| 158 m_viewportApplyScroll, "disable-native-scroll"); |
| 159 |
| 160 m_currentViewportApplyScrollHost = m_effectiveRootScroller; |
| 161 |
| 162 // Ideally, scroll customization would pass the current element to scroll to |
| 163 // the apply scroll callback but this doesn't happen today so we set it |
| 164 // through a back door here. This is also needed by the |
| 165 // ViewportScrollCallback to swap the target into the layout viewport |
| 166 // in RootFrameViewport. |
| 167 m_viewportApplyScroll->setScroller(targetScroller); |
| 168 } |
| 169 |
134 void RootScrollerController::didUpdateCompositing() | 170 void RootScrollerController::didUpdateCompositing() |
135 { | 171 { |
| 172 FrameHost* frameHost = m_document->frameHost(); |
| 173 |
| 174 // Let the compositor-side counterpart know about this change. |
| 175 if (frameHost && m_document->isInMainFrame()) |
| 176 frameHost->chromeClient().registerViewportLayers(); |
136 } | 177 } |
137 | 178 |
138 void RootScrollerController::didAttachDocument() | 179 void RootScrollerController::didAttachDocument() |
139 { | 180 { |
| 181 if (!m_document->isInMainFrame()) |
| 182 return; |
| 183 |
| 184 FrameHost* frameHost = m_document->frameHost(); |
| 185 FrameView* frameView = m_document->view(); |
| 186 |
| 187 if (!frameHost || !frameView) |
| 188 return; |
| 189 |
| 190 RootFrameViewport* rootFrameViewport = frameView->getRootFrameViewport(); |
| 191 DCHECK(rootFrameViewport); |
| 192 |
| 193 m_viewportApplyScroll = ViewportScrollCallback::create( |
| 194 &frameHost->topControls(), |
| 195 &frameHost->overscrollController(), |
| 196 *rootFrameViewport); |
| 197 |
| 198 updateEffectiveRootScroller(); |
140 } | 199 } |
141 | 200 |
142 GraphicsLayer* RootScrollerController::rootScrollerLayer() | 201 GraphicsLayer* RootScrollerController::rootScrollerLayer() |
143 { | 202 { |
144 if (!m_effectiveRootScroller) | 203 if (!m_effectiveRootScroller) |
145 return nullptr; | 204 return nullptr; |
146 | 205 |
147 ScrollableArea* area = scrollableAreaFor(*m_effectiveRootScroller); | 206 ScrollableArea* area = scrollableAreaFor(*m_effectiveRootScroller); |
148 | 207 |
149 if (!area) | 208 if (!area) |
150 return nullptr; | 209 return nullptr; |
151 | 210 |
152 GraphicsLayer* graphicsLayer = area->layerForScrolling(); | 211 GraphicsLayer* graphicsLayer = area->layerForScrolling(); |
153 | 212 |
154 // TODO(bokan): We should assert graphicsLayer here and | 213 // TODO(bokan): We should assert graphicsLayer here and |
155 // RootScrollerController should do whatever needs to happen to ensure | 214 // RootScrollerController should do whatever needs to happen to ensure |
156 // the root scroller gets composited. | 215 // the root scroller gets composited. |
157 | 216 |
158 return graphicsLayer; | 217 return graphicsLayer; |
159 } | 218 } |
160 | 219 |
161 bool RootScrollerController::isViewportScrollCallback( | 220 bool RootScrollerController::isViewportScrollCallback( |
162 const ScrollStateCallback* callback) const | 221 const ScrollStateCallback* callback) const |
163 { | 222 { |
164 // TopDocumentRootScrollerController must override this method to actually | 223 if (!callback) |
165 // do the comparison. | 224 return false; |
166 DCHECK(!m_document->isInMainFrame()); | |
167 | 225 |
168 RootScrollerController* topDocumentController = | 226 return callback == m_viewportApplyScroll.get(); |
169 m_document->topDocument().rootScrollerController(); | |
170 return topDocumentController->isViewportScrollCallback(callback); | |
171 } | 227 } |
172 | 228 |
173 Element* RootScrollerController::defaultEffectiveRootScroller() | 229 Element* RootScrollerController::defaultEffectiveRootScroller() |
174 { | 230 { |
175 DCHECK(m_document); | 231 DCHECK(m_document); |
176 return m_document->documentElement(); | 232 return m_document->documentElement(); |
177 } | 233 } |
178 | 234 |
179 } // namespace blink | 235 } // namespace blink |
OLD | NEW |